Anomozamites (Bennettitales) in China: species diversity and temporo-spatial distribution

Xu, Xu; Gou, Xu-Dong; Wan, Sui; Liu, Hangyu; Wei, Hang; Liu, Jianrong; Ding, Jian; Yang, Bin; Shu, Yong-Ping; Hua, Yan-Ping; Zhuo, Feng

doi:10.1127/palb/2019/0067

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…described by Lozano-Carmona et al (2019) for the Zorrillo-Taberna Formation, since, although Person and Delevoryas (1982) mention for the first time the presence of the genus for the Rosario (Early Jurassic) and Zorrillo (Middle Jurassic) formations, the conservation status of the specimens did not allow assigning them to a species. On the other hand, the bibliographic review of the morphological characteristics of 30 species of Anomozamites described for Laurasia by Xu et al (2019) and the characteristics described for the species from the Terreno Mixteco indicate that the specimens analyzed here differ from the species with which they were compared in the characteristics of the rachis and the size, shape, and number of veins per leaflet. It is therefore impossible to assign them to a previously described species of the genus.…”

Section: Systematic Paleontologymentioning

confidence: 79%

See 1 more Smart Citation

New records of Bennettitales and associated flora from the Jurassic of the Cualac Formation, Mexico

Velasco de León,

Ortiz Martínez,

Flores Barragan

et al. 2024

Palaeontol Electron

View full text Add to dashboard Cite

The present work contributes to the palaeofloristic knowledge of the Jurassic in the Cualac Formation of Mexico with the first records of the genera Anomozamites, Cycadolepis, Czekanowskia, Mexiglossa, and Williamsoniella. A new species of bisexual structure, Williamsonia rosarensis, is described; the species Zamites diquiyui is emended and the cuticular characters of the dominant species Mexiglossa varia are described for the first time. These data substantially increase the plant diversity of this stratigraphic unit and provide information about the environment in which they were preserved. These new reports come from a new locality of the Cualac Formation, in the state of Oaxaca, Mexico, called Rosario. After considering some sedimentological and taphonomic aspects, it is proposed that this locality represented an alluvial fan depositional environment that evolved into a flood plain, which favored the state of preservation of the specimens, and even preserved cuticular characters that allows an updated and more detailed taxonomy of three species. A notable find is Williamsoniella rosarensis nov. sp., a genus which has been previously reported from two Middle Jurassic localities in the UK and one in Mexico. A possible organic connection between this structure and leaves of Zamites diquiyui is also proposed. The findings mentioned above indicate that Bennettitales is the most abundant order (61.4%) with eight genera and 15 species. The present contribution confirms that paleofloristic lists are still incomplete, and thus it is necessary to continue the work in the Jurassic formations described for Mexico.

show abstract

Section: Systematic Paleontologymentioning

confidence: 79%

“…At the end of this period, the number of its species decreased significantly but its distribution extended. It was in Mexico in the region of Tezoatlán (Oaxaca) during the Lower Jurassic and up to the Middle Jurassic, but finally disappeared from the planet during the Cretaceous (Xu et al, 2019). Material examined.…”

Section: Systematic Paleontologymentioning

confidence: 99%